Birdhouse



FIG. 1 is a perspective view taken from the top, front and left side of a birdhouse showing our new design;

FIG. 2 is a perspective view taken from the top, rear and right side thereof; and

FIG. 3 is a plan view of the blank that forms the birdhouse shown in FIG. 1. 

The ornamental design for a birdhouse, as shown. 